From: | Alban Hertroys <alban(at)magproductions(dot)nl> |
---|---|
To: | SunWuKung <Balazs(dot)Klein(at)t-online(dot)hu> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: evaluating equation stored in a string |
Date: | 2006-04-26 16:05:45 |
Message-ID: | 444F9A59.6000108@magproductions.nl |
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Thread: | |
Lists: | pgsql-general |
SunWuKung wrote:
> However I have a problem with this cast. I don't know how to handle
> brackets in the equation, since
>
> SELECT 35/124 ::numeric
> --0.28....
>
> while
>
> SELECT (35/124) ::numeric
> -- 0
The brackets aren't your problem, your numbers aren't as accurate as the
result you require. An eval() function would give the same results.
You'll want this instead:
SQL> select (35.0/124.0)::numeric;
numeric
------------------------
0.28225806451612903226
Regards,
--
Alban Hertroys
alban(at)magproductions(dot)nl
magproductions b.v.
T: ++31(0)534346874
F: ++31(0)534346876
M:
I: www.magproductions.nl
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